Please help me find the standard deviation of the overall payoff of Bank A and B (round to two decimal places)

Considor two loca banks. Bark A has 75 loans outstanding, each for $10 milion, thut t expects welf be repaid foday Each loan has a 4% probabily of default, in which case the bankis not repoid enythng. Calculate the following a. The expected overal payoff of each bank. b. The standard deviation of the overal payoff of eoch bank a. The expected overall payof of esch bank The expecled overal payoff of Bark A is 572 malion. (Round to the nesent inlogor) The expected overal payot of Bark B is 5 mition (Round to the newrest integec) b. The standard devation of the overal peyot of each bank. The standed doviation of the overall payoff of Bank A is (Round to two deorna places.)